National Theatre, Louis A. Lotito, managing director, Allen-Hodgdon, Inc., and Stevens Productions, Inc., present Hume Cronyn, Robert Shaw, Jessica Tandy, George Voskovec, Martyn Green in "The Physicists," a new comedy by Friedrich Duerrenmatt (adapted by James Kirkup), with Frances Heflin, Doris Rich, Judith Brown, scenery, lighting and costumes by John Bury, supervision by Lloyd Burlingame, produced by arrangement with Robert Whitehead, production staged by Peter Brook.